Washington County, Iowa
Precinct data
Results by precinct
10 precincts · 11,551 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -RiversideRiverside | 764 | 939 | 17 | 1,720 | 44.4% | 54.6% | R+10.2 |
|---|---|---|---|---|---|---|---|
| Precinct -KalonaKalona | 682 | 966 | 14 | 1,662 | 41.0% | 58.1% | R+17.1 |
| Precinct -WellmanWellman | 449 | 976 | 17 | 1,442 | 31.1% | 67.7% | R+36.5 |
| Precinct -Ward 3Ward 3 | 498 | 710 | 17 | 1,225 | 40.7% | 58.0% | R+17.3 |
| Precinct -Ward 4Ward 4 | 482 | 636 | 19 | 1,137 | 42.4% | 55.9% | R+13.5 |
| Precinct -Ward 2Ward 2 | 371 | 658 | 12 | 1,041 | 35.6% | 63.2% | R+27.6 |
| Precinct -Ward 1Ward 1 | 415 | 593 | 11 | 1,019 | 40.7% | 58.2% | R+17.5 |
| Precinct -AinsworthAinsworth | 233 | 594 | 12 | 839 | 27.8% | 70.8% | R+43.0 |
| Precinct -BrightonBrighton | 212 | 610 | 9 | 831 | 25.5% | 73.4% | R+47.9 |
| Precinct -RichmondRichmond | 191 | 437 | 7 | 635 | 30.1% | 68.8% | R+38.7 |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −7.9% |
| 1896 | −11.1% |
| 1900 | −11.6% |
| 1904 | −22.7% |
| 1908 | −10.5% |
| 1912 | +15.4% |
| 1916 | −12.2% |
| 1920 | −43.5% |
| 1924 | −38.0% |
| 1928 | −36.5% |
| 1932 | +7.7% |
| 1936 | −2.6% |
| 1940 | −16.7% |
| 1944 | −21.5% |
| 1948 | −14.5% |
| 1952 | −45.3% |
| 1956 | −31.8% |
| 1960 | −29.0% |
| 1964 | +16.1% |
| 1968 | −27.9% |
| 1972 | −29.7% |
| 1976 | −9.9% |
| 1980 | −14.3% |
| 1984 | −19.7% |
| 1988 | +0.5% |
| 1992 | −2.1% |
| 1996 | +2.8% |
| 2000 | −9.8% |
| 2004 | −12.9% |
| 2008 | −0.7% |
| 2012 | −4.1% |
| 2016 | −20.1% |
| 2020 | −20.5% |
| 2024 | −24.4% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 37.2%3,235 | 62.8%5,450 | 8,685 |
| 2020 | R | 38.8%4,519 | 58.1%6,773 | 11,649 |
Registered voters
By party of registration, over time
Registration and the presidential vote track closely here — within 1.9 points.
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 14,873 | 3,682 | 5,578 | 5,606 | 7 |
| 2010 | 15,167 | 3,601 | 5,775 | 5,776 | 15 |
| 2012 | 14,591 | 3,257 | 6,005 | 5,313 | 16 |
| 2014 | 14,782 | 3,142 | 5,884 | 5,709 | 47 |
| 2016 | 15,160 | 3,203 | 6,442 | 5,416 | 99 |
| 2018 | 15,049 | 3,253 | 6,046 | 5,623 | 127 |
| 2020 | 15,594 | 3,804 | 6,297 | 5,352 | 141 |
| 2022 | 15,582 | 3,477 | 6,697 | 5,266 | 142 |
| 2024 | 15,576 | 3,307 | 6,807 | 5,325 | 137 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+43 net domestic migration · 2025
Net −232 over 2011–2025 · gain loss
Arrivals reported $62,133 in average income, against $84,807 for residents who stayed — 27% lower. (IRS SOI, 2022–23)
The places arrivals came from lean D+12.5 on average — 37 points more Democratic-leaning than Washington County, IA itself (R+24.4).
Where arrivals came from lean of each source
- Johnson County, IA152D+37.8
- Linn County, IA45D+9.9
- Henry County, IA36R+35.9
- Keokuk County, IA31R+51.5
Where departures went households, 2022–23
- Johnson County, IA121
- Linn County, IA48
- Henry County, IA36
- Keokuk County, IA28
- Polk County, IA21
Migration is one input to a place’s political change, not its cause — a shift can also come from residents changing their minds, generational turnover, or turnout. These figures describe the places people moved between; they do not measure how any mover voted.
| Year | Net domestic migration |
|---|---|
| 2011 | +123 |
| 2012 | +49 |
| 2013 | −45 |
| 2014 | +4 |
| 2015 | +41 |
| 2016 | −97 |
| 2017 | +83 |
| 2018 | −195 |
| 2019 | −142 |
| 2021 | −76 |
| 2022 | +24 |
| 2023 | −30 |
| 2024 | −14 |
| 2025 | +43 |
Washington County sits in southeast Iowa along the English River, its electorate anchored by small-town and agricultural communities that have shifted steadily rightward over the past two decades, with the 2024 presidential margin reaching R+24.4.
Across the recorded series it reached a Democratic high of 16.1 points in 1964 and a Republican high of 45.3 points in 1952. Between 2020 and 2024 the county moved 3.9 points toward the Republican candidate; the 2024 margin was 24.4 points.
A population of 22,561, a 89% non-Hispanic-white share, and a median household income of $75,647 describe the county. The county's voting pattern over the last decade is most similar to that of Cedar County and Jones County.
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
Browse places by community — income, education, race & ethnicity, language — all community cuts →
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Washington County, Iowa. Akashic. https://akashic.app/county/19183/. Accessed May 20, 2026. License: CC BY 4.0.